Site Planning Considerations - Comba Telecom RA-7800 Installation Manual

3.2

SITE PLANNING CONSIDERATIONS

Site Considerations
The MU can be located indoors to facilitate coupling of BTS signals and power supply connections.
The ALC range of received BTS signal is -15~5dBm. Hence, an appropriate coupler must be used
according to the BTS output power.
The RU is designed to be waterproof, rainproof, and with snow protection. Temporary protection
should be taken when the equipment enclosure is opened for installation or maintenance in an
outdoor environment. The equipment must not be opened for installation or maintenance in bad
weather (e.g. gale, storm rainfall, extreme temperatures and high humidity)
The site considerations for RUs are listed below:
•
The distance between the service antenna of RU and coverage area should satisfy line of sight
requirements for maximum coverage area.
•
The system delay of the optical system must be taken into consideration when there are
neighboring BTS sites overlapping in coverage.
Installation Location
Mounting surface shall be capable of supporting the weight of the equipment.
In order to avoid electromagnetic interference, a proper mounting location must be selected to
minimize interference from electromagnetic sources such as large electrical equipment.
Environmental
Humidity has an adverse effect on the reliability of the equipment. It is recommended to install the
equipment in locations having stable temperature and unrestricted air-flow.
The installation location for MU should be well ventilated. It is recommended that the distance
between the enclosure and the wall (or any other equipments) should be at least 80~100cm. The
equipment has been designed to operate at the temperature range and humidity level as stated in the
product specifications.
Direct day light to the RU should be avoided. If the direct day light temperature exceeds 40
shelter should be provided for it.
Powering
The power supply unit (PSU) provides power to all modules within the equipment. Depending on the
product variant, it is recommended that the PSU operates on a dedicated AC circuit breaker or fused
circuit.
Grounding Requirement
Verify that the equipment has been well grounded. This includes antennas and all cables connected
to the system. Ensure lightning protection for the antennas is properly grounded.
RA-7800 QI
ENU Status : 1-0-1
INSTALLATION GUIDE FOR RA-7800
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